Palm Thursday announced the Centro, its first non-Treo PDA/cell phone hybrid based on the Palm OS.

Slated to debut on Sprint in October, the Centro is significantly smaller and—after a slew of rebates, at least—cheaper than Treo counterparts that likewise support Sprint's superfast EvDO 3G network. Sprint has a 90-day exclusivity agreement for the Centro.

The Palm Centro

The phone lists for US$400, but rebates for a new two-year contract and a $25 or $30 all-you-can-eat data plan sign-up can reduce the initial expenditure to $100. (The $30 monthly plan adds unlimited messaging; the $25 monthly data plan offers fewer messaging options.)

Available in bright red or black, the petite candy-bar handset targets a more mainstream audience than the business-focused Treo does. It measures 4.2 inches high, 2.1 inches wide and 0.7 inches thick, and it weighs a mere 4.2 ounces.

Other hardware specs include a 1.3-megapixel camera with 2X digital zoom and video capture; Bluetooth; a 320-by-320-resolution, 65,000-color transflective touch screen; and a Micro-SD slot that supports cards with up to 4GB of storage capacity. You'll probably need a card if you intend to use the Centro to play music or store images, because the device has only 64MB of user-available internal memory.